panipanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 94949 26428 0 0 0x4000000 1 syz-executor.1 351172 82281 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82200de3,ffffffff821ed271,2b2,ffffffff821d0030) at __assert+0x2e sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 11 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic malloc: allocation too large, type = 2, size = 18446744073709551296 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82200de3,ffffffff821ed271,2b2,ffffffff821d0030) at __assert+0x2e sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800023bc6f80 rbx 0xffff800023bc7030 rdx 0xffff800020ac0500 rcx 0 rax 0 r8 0xffffffff81788e23 kprintf+0x173 r9 0x1 r10 0x25 r11 0xfc5fb6ce17431659 r12 0x3000000008 r13 0xffff800023bc6f90 r14 0x104 r15 0x1 rip 0xffffffff819f49b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023bc6f70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=94949 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe780,0xffffffff8264e688 process=0xffff800020a4bc08 user=0xffff800023bc2000, vmspace=0xfffffd807f00c450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26428 192967 57328 0 2 0 syz-executor.1 26428 405113 57328 0 3 0x4000000 biowait syz-executor.1 26428 75306 57328 0 2 0x4000000 syz-executor.1 *26428 94949 57328 0 7 0x4000000 syz-executor.1 82281 337507 66247 0 2 0 syz-executor.0 82281 351172 66247 0 7 0x4000000 syz-executor.0 82281 251674 66247 0 3 0x4000080 fsleep syz-executor.0 82281 134523 66247 0 3 0x4000080 fsleep syz-executor.0 57328 199810 90568 0 3 0x82 nanosleep syz-executor.1 38558 263135 1 0 3 0x100083 ttyin getty 77904 188958 0 0 3 0x14200 bored sosplice 66247 322794 90568 0 3 0x82 nanosleep syz-executor.0 90568 373912 31305 0 3 0x82 thrsleep syz-fuzzer 90568 506810 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 412062 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 246661 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 293973 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 426237 31305 0 3 0x4000082 kqread syz-fuzzer 90568 449761 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 103883 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 37931 31305 0 3 0x4000082 thrsleep syz-fuzzer 90568 233335 31305 0 3 0x4000082 thrsleep syz-fuzzer 31305 80433 69869 0 3 0x10008a pause ksh 69869 473218 52765 0 3 0x92 select sshd 52765 39289 1 0 3 0x80 select sshd 12884 434903 12225 74 3 0x100092 bpf pflogd 12225 140119 1 0 3 0x80 netio pflogd 8742 470432 22162 73 3 0x100090 kqread syslogd 22162 324254 1 0 3 0x100082 netio syslogd 55698 47001 1 77 3 0x100090 poll dhclient 3508 464559 1 0 3 0x80 poll dhclient 1640 320883 0 0 2 0x14200 zerothread 708 352689 0 0 3 0x14200 aiodoned aiodoned 8649 466782 0 0 3 0x14200 syncer update 40128 322842 0 0 3 0x14200 cleaner cleaner 66143 353841 0 0 3 0x14200 reaper reaper 76486 203472 0 0 3 0x14200 pgdaemon pagedaemon 62650 433611 0 0 3 0x14200 bored crynlk 52077 400304 0 0 3 0x14200 bored crypto 1780 216204 0 0 3 0x40014200 acpi0 acpi0 44683 394576 0 0 3 0x40014200 idle1 96613 262888 0 0 3 0x14200 bored softnet 24287 470862 0 0 3 0x14200 bored systqmp 10127 343549 0 0 3 0x14200 bored systq 92594 243300 0 0 3 0x40014200 bored softclock 15569 116784 0 0 3 0x40014200 idle0 85018 23993 0 0 3 0x14200 bored smr 1 498743 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 26428 (syz-executor.1) thread 0xffff800020abec70 (405113) exclusive rrwlock inode r = 0 (0xfffffd806e2ee808) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xce sys/kern/vfs_vops.c:449 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e1c6c50) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:561 #5 vfs_lookup+0xec sys/kern/vfs_lookup.c:418 #6 namei+0x61c sys/kern/vfs_lookup.c:248 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 Process 82281 (syz-executor.0) thread 0xffff800020abf8c8 (351172) shared rwlock vmlistlock r = 0 (0xffff80000066e478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_get_info+0x39 sys/arch/amd64/amd64/vmm.c:3712 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b8 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8261f770) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x412 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x412 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9599 6519K 7327K 78643K 16895 0 0 pcb 13 8K 8K 78643K 248 0 0 rtable 111 4K 5K 78643K 864 0 0 ifaddr 81 17K 17K 78643K 339 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1599 0 0 iov 0 0K 32K 78643K 223 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1208 76K 77K 78643K 3385 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 28 0 0 VM map 2 1K 1K 78643K 4 0 0 sem 12 0K 1K 78643K 279 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 2427 0 0 sigio 0 0K 0K 78643K 34 0 0 proc 54 51K 83K 78643K 837 0 0 subproc 32 2K 2K 78643K 102 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 190 0 0 in_multi 33 2K 2K 78643K 146 0 0 ether_multi 1 0K 0K 78643K 20 0 0 mrt 0 0K 0K 78643K 9 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 435 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 112 22K 30K 78643K 8640 0 0 UVM aobj 79 6K 6K 78643K 87 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 214 0 0 NDP 19 0K 0K 78643K 97 0 0 temp 221 3556K 3627K 78643K 49319 0 0 kqueue 0 0K 0K 78643K 10 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 115 0 113 1 0 1 1 0 8 0 rtentry 112 94 0 50 2 0 2 2 0 8 0 unpcb 120 864 0 851 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9580 0 9580 3 3 0 2 0 8 0 tcpcb 544 483 0 479 1 0 1 1 0 8 0 inpcb 280 1341 0 1334 4 3 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 18 0 12 1 0 1 1 0 8 0 pkpcb 40 16 0 16 5 5 0 1 0 8 0 ppxss 1128 51 0 51 4 3 1 1 0 8 1 pffrag 232 3 0 3 2 2 0 1 0 482 0 pffrnode 88 3 0 3 2 2 0 1 0 8 0 pffrent 40 8 0 8 2 2 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 72 0 52 1 0 1 1 0 8 0 pfstkey 112 72 0 52 1 0 1 1 0 8 0 pfstate 328 72 0 52 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 376 0 185 13 1 12 12 0 8 0 art_table 32 377 0 185 2 0 2 2 0 8 0 art_node 16 89 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 277 0 267 1 0 1 1 0 8 0 shmpl 112 85 0 8 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5186 0 3760 47 0 47 47 0 8 0 ffsino 272 5186 0 3760 96 0 96 96 0 8 0 nchpl 144 8820 0 7180 62 0 62 62 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 27499 0 27498 3 2 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 2 0 2 1 1 0 1 0 8 0 scsiplug 64 4 0 4 3 3 0 1 0 8 0 scxspl 192 26645 0 26644 13 12 1 7 0 8 0 plimitpl 152 245 0 237 1 0 1 1 0 8 0 sigapl 432 2616 0 2600 3 1 2 3 0 8 0 futexpl 56 31157 0 31155 1 0 1 1 0 8 0 knotepl 112 501 0 482 1 0 1 1 0 8 0 kqueuepl 104 509 0 507 1 0 1 1 0 8 0 pipepl 112 1440 0 1421 5 4 1 2 0 8 0 fdescpl 488 2617 0 2600 3 0 3 3 0 8 0 filepl 152 15126 0 15022 11 6 5 7 0 8 1 lockfpl 104 728 0 728 3 2 1 1 0 8 1 lockfspl 48 265 0 265 3 2 1 1 0 8 1 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 45 0 34 1 0 1 1 0 8 0 ucredpl 96 2552 0 2543 1 0 1 1 0 8 0 zombiepl 144 2600 0 2600 3 2 1 1 0 8 1 processpl 896 2633 0 2600 4 0 4 4 0 8 0 procpl 632 7630 0 7582 8 3 5 5 0 8 1 srpgc 64 9 0 9 4 4 0 1 0 8 0 sosppl 128 30 0 30 6 5 1 1 0 8 1 sockpl 384 2358 0 2336 6 3 3 4 0 8 0 mcl64k 65536 263 0 0 33 10 23 33 0 8 1 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 16 0 0 2 0 2 2 0 8 0 mcl9k 9216 14 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 202 0 0 23 0 23 23 0 8 0 mtagpl 80 53 0 0 2 0 2 2 0 8 0 mbufpl 256 395 0 0 23 0 23 23 0 8 0 bufpl 256 11104 0 4085 439 0 439 439 0 8 0 anonpl 16 241245 0 228406 101 39 62 69 0 124 5 amapchunkpl 152 14755 0 14641 16 8 8 10 0 158 0 amappl16 192 12635 0 11912 99 55 44 48 0 8 7 amappl15 184 9 0 9 2 2 0 1 0 8 0 amappl14 176 78 0 72 1 0 1 1 0 8 0 amappl13 168 16 0 15 3 2 1 1 0 8 0 amappl12 160 1178 0 1174 2 1 1 1 0 8 0 amappl11 152 482 0 467 1 0 1 1 0 8 0 amappl10 144 773 0 769 1 0 1 1 0 8 0 amappl9 136 640 0 635 1 0 1 1 0 8 0 amappl8 128 301 0 273 4 3 1 2 0 8 0 amappl7 120 742 0 735 1 0 1 1 0 8 0 amappl6 112 460 0 454 1 0 1 1 0 8 0 amappl5 104 1536 0 1518 1 0 1 1 0 8 0 amappl4 96 1750 0 1718 2 1 1 2 0 8 0 amappl3 88 1412 0 1401 1 0 1 1 0 8 0 amappl2 80 19905 0 19823 3 1 2 3 0 8 0 amappl1 72 65426 0 64966 27 17 10 20 0 8 0 amappl 80 7961 0 7920 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 86 0 8 2 0 2 2 0 8 0 uaddrrnd 24 2619 0 2600 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2619 0 2600 1 0 1 1 0 8 0 vmmpekpl 168 22980 0 22951 2 0 2 2 0 8 0 vmmpepl 168 325011 0 323031 186 80 106 107 0 357 19 vmsppl 368 2616 0 2600 2 0 2 2 0 8 0 pdppl 4096 5245 0 5204 7 1 6 6 0 8 0 pvpl 32 673326 0 657179 234 77 157 171 0 265 20 pmappl 232 2618 0 2602 3 2 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 653 0 17 19 0 19 19 0 8 0